Keyhole-guard.



No. 701,059. Patented May 27, I902.

LAGROIX & H. BRISSELET.

KEYHOLE GUARD.

(Application filed Mar. 8, 1902.)

(No Model.)

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.5 fixed to the said bottom Z) of the box.

UNiTnn STATES ATENT @FFICE.

LOUIS LACROIX AND HENRI BRISSELET, OF GENEVA, SWITZERLAND.

KEYHOLE- -GUARD.

SPECIFICATION forming part of Letters Patent No. 701,059, dated May 27, 1902.

Application filed March 6, 1902. Serial No. 96,915- (No model.

i of a special safety-key.

In the accompanying drawings, Figure 1 shows the improved keyhole-guard in front elevation and in a closed condition. Fig. 2 shows the same with half-engaged safety-key 2e and with the upper portion of the casing or movable portion of the guard being broken away. Fig. 3 shows the base-plate or fixed portion of the device in front elevation. Fig. 4. is a vertical section of the device. Fig. 5 is :5 a cross-section of the same.

The base-plate a or fixed portion of the device is intended to be fixed,by means of screws engaging the holes a, to the door or piece of furniture to the keyhole of which the device is to be applied. The said plate a has an opening a for the passage of the key to the lock, and it further bears two conical studs, projections, or hooks a, having suitable lateral notches or outcuts to engage with the g5 rocking levers c c, as shown in Figs. 2 and 5. The plate a is furthermore provided with a hole a", into which engages a projection b of the box I) Z), forming the movable portion of the keyhole guard. To the bottom portion .0 b of the said box are pivotally fixed the rocking levers c, which are normallymaintained in their position, as shown in full lines in Fig. 2, by means of a double-armed spring (I, and which are suitably guided by the bridges e, The

latter is provided with suitable holes to allow the stud or projection a; of the plate a to enter the said box when the stud or projection b of the latter is engaged into the hole a and to o engage the rocking levers c 0. (Shown in Figs. 2 and 5.) The box b b is further pro- Vided with suitable pieces of corrugated metal f and g, engaging with one another and leaving a small space for the passage of a safetykey t', formed of a small piece of sheet metal stamped to exactly the shape of the corruga tionsf and g. The said key '5 may therefore be engaged between the said corrugations f and g, and if pressed to top it will draw the levers c from their position shown in full lines to their position shown in dotted lines in Fig. 2, whereby the said levers c are disengaged from the lateral outcuts of the projections, studs, or hooks a of the plate a, allowing then the box I) Z that is to say, the movable portion of the keyhole-guardto be removed from the said plate a, and the lock-key to be engaged through the hole a into the lock.

Having thus fully described our invention, we claim- 1. In keyhole-guards, the combination of a frame or plate having suitable openings and projections forming the fixed portion of the device, with a movable portion or box intended to be applied upon the said frame or plate and containing suitable levers arranged to engage the said projections of the fixed portion, and with a safety-key formed of corrugated sheet metal and arranged to disengage the said rocking levers from the said studs or projections when it is engaged into the said box, substantially as and for the purpose specified.

2. lnkeyhole-guards, the combination of a frame or plate at having a suitable opening a and one or more projections 0, forming the fixed portion of the device, with a movable portion or box as b I) intended to be applied upon the said frame or plate a and containing one or more rocking levers 0 arranged to engage the said projections or books a of the plate a and with a safety-key t' formed of a piece of corrugated sheet metal intended to slide between the corrugated metal pieces f and g fixed to the box I) Z).

In testimony that we claim the foregoing as our invention we have signed our names in presence of two subscribing witnesses.

LOUIS LAOROIX. HENRI BRISSELET. \Vitnesse's:

E. IMER-SCHNEIDER, L. H. MUNIER. 

